#ifndef CONTROL_H
#define CONTROL_H
#include <QWidget>namespace Ui {
class Control;
}class Control : public QWidget
{Q_OBJECTpublic:explicit Control(QWidget *parent = 0);~Control();int A1X,A1Y;int A2X,A2Y;int pressX,pressY;int curentX,curentY;
protected:void paintEvent(QPaintEvent *event);void mouseMoveEvent(QMouseEvent *event);void mousePressEvent(QMouseEvent *event);private:Ui::Control *ui;
};#endif // CONTROL_H

#include "control.h"
#include "ui_control.h"
#include <QDebug>
#include <QMouseEvent>
Control::Control(QWidget *parent) :QWidget(parent),ui(new Ui::Control)
{ui->setupUi(this);A2X = this->pos().x();A2Y = this->pos().y();
}Control::~Control()
{delete ui;
}void Control::paintEvent(QPaintEvent *event)
{
#if 1QPalette palette(this->palette());palette.setColor(QPalette::Background, Qt::black);this->setAutoFillBackground(true);this->setPalette(palette);
#endifif(A2X==0 && A2Y==0){return;}this->move(A2X,A2Y);
}void Control::mouseMoveEvent(QMouseEvent *event)
{if (event->buttons() == Qt::LeftButton) // 这个if判断只是为了保证是按压鼠标左键移动产生窗体拖动效果
    {
#if 0curentX = event->x();//鼠标点相对当前widget的位置curentY = event->y();
#endifcurentX = event->globalX();//鼠标点相对整个显示器的位置curentY = event->globalY();A2X = A1X+curentX-pressX;A2Y = A1Y+curentY-pressY;
#if 0qDebug()<< "mouseMoveEvent:" << curentX << curentY;qDebug()<< "A2XY:" << A2X << A2Y;
#endifupdate();}
}void Control::mousePressEvent(QMouseEvent *event)
{pressX = event->globalX();//鼠标点相对整个显示器的位置pressY = event->globalY();A1X = this->x();//widget左上角相对程序的位置A1Y = this->y();
#if 0int a = event->x();//鼠标点相对当前widget的位置int b = event->y();int c = this->geometry().x();//widget左上角相对程序的位置int d = this->geometry().y();qDebug()<< "mousePressEvent:" << pressX << pressY;qDebug()<< "A1XY:" << A1X << A1Y;qDebug()<< "A1xy:" << A1X << A1Y;qDebug()<< "ab:" << a << b;qDebug()<< "cd:" << c << d;
#endif
}